A128279 - cp's OEIS frontend

A128279 an=n-th smallest integer of the form m=p1*p2 where pi are odd primes such that d+2m/d are all primes for d dividing 2m.

n	a(n)
1	15
2	21
3	35
4	39
5	51
6	65
7	95
8	155
9	221
10	329
11	371
12	485
13	519
14	611
15	905
16	989
17	1121
18	1199
19	1469
20	1509
21	1541
22	1661
23	1821
24	3039
25	3189
26	3431
27	3641
28	3791
29	4055
30	4109
31	4281
32	4601
33	4859
34	5079
35	5111
36	5195
37	5331
38	5429
39	5579
40	5951
41	5979
42	6161
43	6245
44	6731
45	6881
46	7415

[15, 21, 35, 39, 51, 65, 95, 155, 221, 329, 371, 485, 519, 611, 905, 989, 1121, 1199, 1469, 1509, 1541, 1661, 1821, 3039, 3189, 3431, 3641, 3791, 4055, 4109, 4281, 4601, 4859, 5079, 5111, 5195, 5331, 5429, 5579, 5951, 5979, 6161, 6245, 6731, 6881, 7415]

cp's OEIS Frontend

A128279 an=n-th smallest integer of the form m=p1*p2 where pi are odd primes such that d+2m/d are all primes for d dividing 2m.

Table of values

List of values